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    <div class="refentry" id="glFlushMappedBufferRange">
      <div class="titlepage"/>
      <div class="refnamediv">
        <h2>Name</h2>
        <p>glFlushMappedBufferRange — indicate modifications to a range of a mapped buffer</p>
      </div>
      <div class="refsynopsisdiv">
        <h2>C Specification</h2>
        <div class="funcsynopsis">
          <table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
            <tr>
              <td>
                <code class="funcdef">void <strong class="fsfunc">glFlushMappedBufferRange</strong>(</code>
              </td>
              <td>GLenum <var class="pdparam">target</var>, </td>
            </tr>
            <tr>
              <td> </td>
              <td>GLintptr <var class="pdparam">offset</var>, </td>
            </tr>
            <tr>
              <td> </td>
              <td>GLsizeiptr <var class="pdparam">length</var><code>)</code>;</td>
            </tr>
          </table>
          <div class="funcprototype-spacer"> </div>
        </div>
      </div>
      <div class="refsect1" id="parameters">
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>target</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies the target to which the buffer object is bound
                    for <code class="function">glFlushMappedBufferRange</code>, which
                    must be one of the buffer binding targets in the
                    following table:
                </p>
              <div class="informaltable">
                <table style="border-collapse: collapse; border-top: 2px solid ; border-bottom: 2px solid ; border-left: 2px solid ; border-right: 2px solid ; ">
                  <colgroup>
                    <col style="text-align: left; " class="col1"/>
                    <col style="text-align: left; " class="col2"/>
                  </colgroup>
                  <thead>
                    <tr>
                      <th style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <span class="bold">
                          <strong>Buffer Binding Target</strong>
                        </span>
                      </th>
                      <th style="text-align: left; border-bottom: 2px solid ; ">
                        <span class="bold">
                          <strong>Purpose</strong>
                        </span>
                      </th>
                    </tr>
                  </thead>
                  <tbody>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_ARRAY_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Vertex attributes</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_ATOMIC_COUNTER_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Atomic counter storage</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_COPY_READ_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Buffer copy source</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_COPY_WRITE_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Buffer copy destination</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_DISPATCH_INDIRECT_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Indirect compute dispatch commands</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_DRAW_INDIRECT_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Indirect command arguments</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_ELEMENT_ARRAY_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Vertex array indices</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_PIXEL_PACK_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Pixel read target</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_PIXEL_UNPACK_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Texture data source</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_SHADER_STORAGE_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Read-write storage for shaders</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_TEXTURE_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Texture data buffer</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                        <code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER</code>
                      </td>
                      <td style="text-align: left; border-bottom: 2px solid ; ">Transform feedback buffer</td>
                    </tr>
                    <tr>
                      <td style="text-align: left; border-right: 2px solid ; ">
                        <code class="constant">GL_UNIFORM_BUFFER</code>
                      </td>
                      <td style="text-align: left; ">Uniform block storage</td>
                    </tr>
                  </tbody>
                </table>
              </div>
            </dd>
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>offset</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies the start of the buffer subrange, in basic machine units.
                </p>
            </dd>
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>length</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies the length of the buffer subrange, in basic machine units.
                </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1" id="description">
        <h2>Description</h2>
        <p>
            <code class="function">glFlushMappedBufferRange</code> indicates that modifications have been made to a range of a mapped buffer.
            The buffer must previously have been mapped with the <code class="constant">GL_MAP_FLUSH_EXPLICIT</code> flag. <em class="parameter"><code>offset</code></em>
            and <em class="parameter"><code>length</code></em> indicate the modified subrange of the mapping, in basic units. The specified subrange to flush
            is relative to the start of the currently mapped range of the buffer. <code class="function">glFlushMappedBufferRange</code> may be called
            multiple times to indicate distinct subranges of the mapping which require flushing.
        </p>
      </div>
      <div class="refsect1" id="notes">
        <h2>Notes</h2>
        <p>
            The <code class="constant">GL_COPY_READ_BUFFER</code>, <code class="constant">GL_COPY_WRITE_BUFFER</code>, 
            <code class="constant">GL_PIXEL_PACK_BUFFER</code>,<code class="constant">GL_PIXEL_UNPACK_READ_BUFFER</code>,
           <code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER</code> and <code class="constant">GL_UNIFORM_BUFFER</code> 
           targets are available only if the GL ES version is 3.0 or greater.
        </p>
        <p>
            The <code class="constant">GL_ATOMIC_COUNTER_BUFFER</code>, <code class="constant">GL_DISPATCH_INDIRECT_BUFFER</code>,
            <code class="constant">GL_DRAW_INDIRECT_BUFFER</code> and <code class="constant">GL_SHADER_STORAGE_BUFFER</code> 
            targets are available only if the GL ES version is 3.1 or greater.
        </p>
        <p>
            The <code class="constant">GL_TEXTURE_BUFFER</code> target is available only if the GL ES version is 3.2 or greater.
        </p>
      </div>
      <div class="refsect1" id="errors">
        <h2>Errors</h2>
        <p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>offset</code></em> or <em class="parameter"><code>length</code></em>
            is negative, or if <em class="parameter"><code>offset</code></em> + <em class="parameter"><code>length</code></em> exceeds the size of the mapping.
        </p>
        <p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if zero is bound to <em class="parameter"><code>target</code></em>.
        </p>
        <p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if the buffer bound to <em class="parameter"><code>target</code></em> is not
            mapped, or is mapped without the <code class="constant">GL_MAP_FLUSH_EXPLICIT</code> flag.
        </p>
      </div>
      <div class="refsect1" id="versions">
        <h2>API Version Support</h2>
        <div class="informaltable">
          <table style="border-collapse: collapse; border-top: 2px solid ; border-bottom: 2px solid ; border-left: 2px solid ; border-right: 2px solid ; ">
            <colgroup>
              <col style="text-align: left; "/>
              <col style="text-align: center; " class="firstvers"/>
              <col style="text-align: center; "/>
              <col style="text-align: center; "/>
              <col style="text-align: center; " class="lastvers"/>
            </colgroup>
            <thead>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; ">
                 
            </th>
                <th style="text-align: center; border-bottom: 2px solid ; " colspan="4">
                <span class="bold"><strong>OpenGL ES API Version</strong></span>
            </th>
              </tr>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>Function Name</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>2.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.1</strong></span>
            </th>
                <th style="text-align: center; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.2</strong></span>
            </th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td style="text-align: left; border-right: 2px solid ; ">glFlushMappedBufferRange</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; ">✔</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1" id="seealso">
        <h2>See Also</h2>
        <p>
            <a class="citerefentry" href="glMapBufferRange.xhtml"><span class="citerefentry"><span class="refentrytitle">glMapBufferRange</span></span></a>,
            <a class="citerefentry" href="glUnmapBuffer.xhtml"><span class="citerefentry"><span class="refentrytitle">glUnmapBuffer</span></span></a>
        </p>
      </div>
      <div class="refsect1" id="Copyright">
        <h2>Copyright</h2>
        <p>
            Copyright <span class="trademark"/>© 2010-2015 Khronos Group.
            This material may be distributed subject to the terms and conditions set forth in
            the Open Publication License, v 1.0, 8 June 1999.
            <a class="link" href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p>
      </div>
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